diff --git a/app/build.gradle b/app/build.gradle
index fa106a5..e6e473d 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -12,8 +12,8 @@ android {
         applicationId "top.fumiama.simpledict"
         minSdkVersion 26
         targetSdkVersion 30
-        versionCode 12
-        versionName '1.9.1'
+        versionCode 13
+        versionName '1.9.2'
         resConfigs "zh", "zh-rCN"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
@@ -47,8 +47,8 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.3.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
-    implementation 'androidx.navigation:navigation-fragment-ktx:2.3.3'
-    implementation 'androidx.navigation:navigation-ui-ktx:2.3.3'
+    implementation 'androidx.navigation:navigation-fragment-ktx:2.3.5'
+    implementation 'androidx.navigation:navigation-ui-ktx:2.3.5'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
diff --git a/app/src/main/java/top/fumiama/simpledict/MainActivity.kt b/app/src/main/java/top/fumiama/simpledict/MainActivity.kt
index 736ea22..78be7a5 100644
--- a/app/src/main/java/top/fumiama/simpledict/MainActivity.kt
+++ b/app/src/main/java/top/fumiama/simpledict/MainActivity.kt
@@ -157,12 +157,6 @@ class MainActivity : AppCompatActivity() {
                 }
             })
 
-            setOnClearClickListener(object : SearchLayout.OnClearClickListener {
-                override fun onClearClick() {
-                    Toast.makeText(this@MainActivity, "clear", Toast.LENGTH_SHORT).show()
-                }
-            })
-
             setOnFocusChangeListener(object : SearchLayout.OnFocusChangeListener {
                 override fun onFocusChange(hasFocus: Boolean) {
                     navigationIconSupport = if (hasFocus) SearchLayout.NavigationIconSupport.ARROW
@@ -206,9 +200,16 @@ class MainActivity : AppCompatActivity() {
 
     private fun fetchThread(doWhenFinish: (()->Unit)? = null) {
         Thread{
-            dict?.fetchDict {
+            dict?.fetchDict({
+                runOnUiThread {
+                    Toast.makeText(this@MainActivity, "刷新失败", Toast.LENGTH_SHORT).show()
+                }
+            }, {
                 runOnUiThread {
                     Toast.makeText(this@MainActivity, "刷新成功", Toast.LENGTH_SHORT).show()
+                }
+            }) {
+                runOnUiThread {
                     ffsw.isRefreshing = false
                     ad?.capacity = 5
                     ad?.refresh()
diff --git a/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt b/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt
index f0cb9f3..90d1976 100644
--- a/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt
+++ b/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt
@@ -8,7 +8,7 @@ class SimpleDict(private val client: Client, private val pwd: String) {   //must
     val size get() = dict.size
     val keys get() = dict.keys
     var latestKeys = arrayOf<String>()
-    private val raw: ByteArray
+    private val raw: ByteArray?
         get() {
             var times = 3
             var re: ByteArray
@@ -36,7 +36,7 @@ class SimpleDict(private val client: Client, private val pwd: String) {   //must
                     closeDict()
                 }
             } while (times-- > 0)
-            return re
+            return if(re.isEmpty()) null else re
         }
     
     private fun sendMessageWithDelay(msg: CharSequence, delay: Long = 233) = Thread{
@@ -77,16 +77,19 @@ class SimpleDict(private val client: Client, private val pwd: String) {   //must
 
     fun filterValues(predicate: (String?) -> Boolean) = dict.filterValues(predicate)
 
-    fun fetchDict(doOnLoadSuccess: ()->Unit = {
+    fun fetchDict(doOnLoadFailure: ()->Unit = {
         Log.d("MySD", "Fetch dict success")
-    }) {
+    }, doOnLoadSuccess: ()->Unit = {
+        Log.d("MySD", "Fetch dict success")
+    }, doCommon: (() -> Unit)? = null) {
         val dictBlock = ByteArray(128)
         dict = hashMapOf()
         latestKeys = arrayOf()
-        raw.inputStream().let {
+        raw?.inputStream()?.let {
             while (it.read(dictBlock, 0, 128) == 128) analyzeDictBlk(dictBlock)
             doOnLoadSuccess()
-        }
+        }?:doOnLoadFailure()
+        doCommon?.let { it() }
     }
 
     operator fun minusAssign(key: String) {
diff --git a/build.gradle b/build.gradle
index fc37f4b..d421b7e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,12 +1,12 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = '1.4.31'
+    ext.kotlin_version = '1.4.32'
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath "com.android.tools.build:gradle:4.1.2"
+        classpath 'com.android.tools.build:gradle:4.1.3'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong